Finding the Third Proportional to 398,911.50 and 607,594.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,911.50 : 607,594.50 = 607,594.50 : x
2. Step 2: Convert to fraction form
   398,911.50/607,594.50 = 607,594.50/x
3. Step 3: Cross multiply
   398,911.50x = 607,594.50 × 607,594.50
4. Step 4: Simplify right side
   398,911.50x = 369,171,076,430.25
5. Step 5: Solve for x
   x = 369,171,076,430.25/398,911.50
6. Step 6: Final answer
   x = 925,446.06